1. The control device for the obstacle - a voidance of the endoscope is a part of the automatic obstacle - a- voidance subsystem of endoscopy.

2. With the development of the economics, the excessive exploitation and the unconscionable using of the resources, freewill voidance of the pollutant make the environmental problems much more serious.

3. The thesis is devided into four parts:Part one discusses the fundamentals of government voidance by western scholars, which is the theoretical basis of the paper.

4. In this paper, the author presents his study on government voidance concerning the current state of Chinese government as a result of years study and practice.

5. Secondly, according to different norms, the void administrative acts can be classified as: absolute and relative voidance, natural and non-natural , whole and part, and so on.

6. This text is totally divided into four parts: Chapter 1 summarizes the concept and value target of the voidance system of civil evidence.